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SOS Emergency call function fault

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61K views 74 replies 17 participants last post by  Glena  
#44 ·
Do you know what the back-up battery does ?

Mike
 
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#47 ·
PWS said:
Provide back-up for whatever modem the SOS unit uses? I'm guessing (totally!) that it's to protect against such a serious crash that power from the main 12v battery was lost. Presumably that might happen now and again, but surely it would need to be a pretty severe crunch?
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Thanks.

Mike
 
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